leetcode 191 Number of 1 Bits(位运算)
Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight).
For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011
, so the function should return 3.
题解:很简单,一位一位的和1做"与"运算就好。
class Solution {
public:
int hammingWeight(uint32_t n) {
int ans=;
while(n>){
ans+=((n&)==?:);
n>>=;
}
return ans;
}
};
leetcode 191 Number of 1 Bits(位运算)的更多相关文章
- [LeetCode] 191. Number of 1 Bits ☆(位 1 的个数)
描述 Write a function that takes an unsigned integer and return the number of '1' bits it has (also kn ...
- Leetcode#191. Number of 1 Bits(位1的个数)
题目描述 编写一个函数,输入是一个无符号整数,返回其二进制表达式中数字位数为 '1' 的个数(也被称为汉明重量). 示例 : 输入: 11 输出: 3 解释: 整数 11 的二进制表示为 000000 ...
- LN : leetcode 191 Number of 1 Bits
lc 191 Number of 1 Bits 191 Number of 1 Bits Write a function that takes an unsigned integer and ret ...
- LeetCode 191. Number of 1 bits (位1的数量)
Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also know ...
- LeetCode 191 Number of 1 Bits
Problem: Write a function that takes an unsigned integer and returns the number of '1' bits it has ( ...
- [LeetCode] 191. Number of 1 Bits 二进制数1的个数
Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also know ...
- Java for LeetCode 191 Number of 1 Bits
Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also know ...
- (easy)LeetCode 191.Number of 1 Bits
Number of 1 Bits Write a function that takes an unsigned integer and returns the number of ’1' bits ...
- Java [Leetcode 191]Number of 1 Bits
题目描述: Write a function that takes an unsigned integer and returns the number of ’1' bits it has (als ...
随机推荐
- sublime添加sass编译
首先安装Ruby环境sass是基于ruby的产物,因此在安装sass前需要先安装ruby,如果用命令方式编译Sass也是必须安装ruby的.命令行编译sass见!下载Ruby windows 安装包: ...
- 各个DDR对比
一.容量和封装相关 (1)逻辑Bank数量增加 DDR2 SDRAM中有4Bank和8Bank的设计,而DDR3起始的逻辑Bank是8个,另外还为未来的16个逻辑Bank做好了准备. (2)封装(Pa ...
- Nginx 一些常用的URL 重写方法
url重写应该不陌生,不管是SEO URL 伪静态的需要,还是在非常流行的wordpress里,重写无处不在. 1. 在 Apache 的写法 RewriteCond %{HTTP_HOST} n ...
- Spring学习九----------Bean的配置之Bean的定义及作用域的注解实现
© 版权声明:本文为博主原创文章,转载请注明出处 Spring Bean常用注解 @Component:通常注解,可用于任何Bean @Repository:通常用于注解DAO层,即持久层 @Serv ...
- Spring Security 表单登录
1. 简介 本文将重点介绍使用Spring Security登录. 本文将构建在之前简单的Spring MVC示例之上,因为这是设置Web应用程序和登录机制的必不可少的. 2. Maven 依赖 要将 ...
- condarc文件
channels: - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/menpo/ - https://mirrors.tuna.tsingh ...
- caffe2--------ImportError: No module named past.builtins
whale@sea:~/anaconda2/lib/python2.7/site-packages$ python Python 2.7.14 |Anaconda custom (64-bit)| ( ...
- spark之pycharm开发设置
方法一: __author__ = 'similarface' import os import sys os.environ['SPARK_HOME']="/Users/similarfa ...
- Redis专题(2):Redis数据结构底层探秘
前言 上篇文章Redis闲谈(1):构建知识图谱介绍了redis的基本概念.优缺点以及它的内存淘汰机制,相信大家对redis有了初步的认识.互联网的很多应用场景都有着Redis的身影,它能做的事情远远 ...
- 【转】【Pycharm大全】
感谢:陈俊岭的程序员之路 [Pycharm大全]:http://blog.csdn.net/u013088062/article/details/50388329